- Deploy endpoint: validate appId, config, and subdomain before use (prevents 500 crash on empty body)
- Container ops: return 404 instead of 500 for non-existent containers
- Update-subdomain: require oldSubdomain/newSubdomain fields (prevents false 200 with undefined values)
- Global error handler: catch-all that never leaks stack traces or internal paths
- API 404 catch-all: return JSON instead of HTML for unmatched /api/* routes
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Full codebase including API server (32 modules + routes), dashboard frontend,
DashCA certificate distribution, installer script, and deployment skills.
